我有一種用于重復身份驗證的類型：type Authorizer struct {    requester    *Requester    closeChannel chan error}func (requester *Requester) Authorize(autoClose bool) {    // Create a new authorizer from the requester and the close-channel    authorizer := Authorizer{        requester:    requester,        closeChannel: requester.closer,    }    // Ensure that the requester has a reference to the authorizer so we can access the    // updated token    requester.authorizer = &authorizer    // Begin the authentication loop concurrently    go authorizer.manageAuthorization()}func (authorizer *Authorizer) manageAuthorization() {    for {        select {        case _, ok := <-authorizer.closeChannel:            if ok {                fmt.Printf("Closed\n")                return // NEVER RUNS            }        default:            break        }        fmt.Printf("Not closed\n")        // Do inner authorization logic    }}此類創建身份驗證器并處理請求：type Requester struct {    authorizer   *Authorizer    client       *http.Client    closer       chan error}func NewRequester() *Requester {    requester := Requester{        client: new(http.Client),        closer: make(chan error),    }    requester.Authorize(false)    return &requester}func (requester *Requester) Close() {    fmt.Printf("Closing...\n")    close(requester.closer)}所以，到目前為止，我的測試都通過了這段代碼。但是，我在進行報道時遇到了一個有趣的問題。考慮以下代碼段：// Create the test clientclient := Requester{}client.closer = make(chan error)// Begin authenticationclient.Authorize(false)// Now, close the channelclose(client.closer)如果我將它嵌入到測試中并嘗試使用它運行代碼覆蓋率，我注意到指示的行永遠不會運行。此外，我在此處添加的調試消息顯示如下：Not closedNot closedNot closedClosing...Not closedNot closedNot closed消息不會Closed打印。那么，我在這里做錯了什么？